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| Number | Title | Issue Date |
| 8042381 | Knocking determination apparatus and knocking determination method for internal combustion engine A knocking judgement method for an internal combustion engine, in which an engine ECU executes a program judging whether or not such ones of integrated values calculated by integrating the output of a knock sensor at every five degrees of a crank angle are larger th... | 10/25/2011 |
| 7874200 | Internal combustion engine knock determination device An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; ... | 01/25/2011 |
| 7677083 | Internal combustion engine knock determination device An engine ECU executes a program including the steps of: setting a knock waveform model corresponding to engine speed sensed by a crank position sensor; calculating knock intensity N based on the result of comparison between a detected waveform and the set knock wav... | 03/16/2010 |
| 7624619 | Knocking detecting device for an internal combustion engine The present invention relates to a knocking detecting device for an internal combustion engine, for controlling a timing at which an ignition coil is actuated according to a knocking occurrence intensity, the knocking detecting device including the signal processing... | 12/01/2009 |
| 7624618 | Device with a screw plug and a range of devices A device having at least one screw plug for screwing into a first tapped hole of a housing or housing part of the device, the at least one screw plug including a device for sealing, such as a sealing ring, for the connection to the housing in a manner forming a seal... | 12/01/2009 |
| 7594423 | Knock signal detection in automotive systems In an automotive system (300), a knock detection scheme is provided for detecting knock events in an internal combustion engine that are sensed by a transducer structure, such as a non-intrusive acoustic accelerometer sensor (310) to generate sensor si... | 09/29/2009 |
| 7562558 | Knock sensor diagnostic system and method A knock sensor diagnostic system may include a knock sensor. A bias circuit applies a bias voltage to the knock sensor. An input circuit receives an input signal based on the bias voltage. A control module indicates a short circuit associated with the knock sensor b... | 07/21/2009 |
| 7533559 | Engine knocking detection apparatus which adjusts passband of sensor signal bandpass filter in accordance with increases in crankshaft angle In an engine knocking detection apparatus that receives a knocking sensor signal expressing vibration in an internal combustion engine and performs bandpass filter processing of the sensor signal to extract a signal component indicative of engine knocking, during ea... | 05/19/2009 |
| 7526943 | Knock system with detection zones A knock detection module for an engine comprises a statistics storage module and a processing module. The statistics storage module stores M times N vibration profiles corresponding to M zones of operation of the engine and N cylinders of the engine, wherein M and N... | 05/05/2009 |
| 7484405 | System and method for engine sound calibration A method for calibrating an engine is provided. The engine includes a cylinder for combustion of a fuel. The method includes setting combustion parameters of the engine, detecting a combustion noise during combustion proximate to the cylinder, detecting an engine so... | 02/03/2009 |
| 7412874 | Internal combustion engine knock determination device An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; ... | 08/19/2008 |
| 7362096 | Robust detection of strain with temperature correction An apparatus (10) is set forth for measuring a return signal of a magnetostrictive sensor (20) that detects a force, torque, or pressure. The return signal includes noise, a DC resistance (44), an AC resistance and an inductance and the inductan... | 04/22/2008 |
| 7356404 | Knock determination apparatus and method for engines In determining a knock of an engine, a vibration intensity is calculated by logarithm-transforming a peak value or an integral value of an output signal of a knock sensor. Further, a central value VMED of a vibration intensity distribution is calculated, and also a ... | 04/08/2008 |
| 7347081 | Knock detecting apparatus and method for internal combustion engine The signal levels of vibration waveform signals outputted by knock sensors are extracted at a filter processing section for each of a plurality of frequency bands. The mean value of the signal levels in the frequency bands at a point in time when variation of the si... | 03/25/2008 |
| 7331414 | Protective structure for an electrical circuit device A protective structure for an electrical circuit device attached to a vehicle includes a resin case, an electrical circuit, and a rigid body. The electrical circuit is contained in the resin case. The rigid body is contained in the resin case. The rigid body protrud... | 02/19/2008 |
| 7324890 | Ignition timing control apparatus for internal combustion engine An ignition timing control apparatus can obtain high output torque without generating output torque loss, and avoid the deterioration of audibility due to successive knock occurrences. A cylinder specific ignition timing setting section includes a reference ignition... | 01/29/2008 |
| 7305872 | Method for operating an internal combustion engine In an internal combustion engine, a structure-borne noise generated in a combustion chamber is detected by a structure-borne noise sensor. A quantity is ascertained on the basis of the structure-borne noise signal. A reference quantity of an undrifted structure-born... | 12/11/2007 |
| 7302932 | Pre-ignition detection and mitigation A system and method for detecting and mitigating preignition for a multi-cylinder engine is provided. According to one aspect of the disclosure, a method is provided including identifying a preignition event at an affected cylinder; deactivating the affected cylinde... | 12/04/2007 |
| 7278303 | Method for diagnosing an engine control unit and corresponding engine control unit A method for diagnosing an engine control unit (4) conducts an analysis as to whether the signal values from the cylinder pressure sensors (3) are faulty based on at least one characteristic value which is derived from an evaluation of signal values fr... | 10/09/2007 |
| 7272970 | Spark plug having combustion pressure detecting function A spark plug having a combustion pressure detecting function, including a tip end portion in an axial direction of the spark plug capable of generating a spark discharge, a male thread adapted for attaching the spark plug to an internal combustion engine and a metal... | 09/25/2007 |
| 7263430 | Internal combustion engine knock determination device and ignition control system including the same An engine ECU executes a program including the steps of: detecting a waveform of vibration of an engine at a predetermined knock detection gate; determining whether a detected vibration's waveform and a knock waveform model stored in memory match within a predetermi... | 08/28/2007 |
| 7251556 | Knock determination device for internal combustion engine An engine ECU executes a program including a step of calculating coefficient of correlation K that is a value related to a deviation between a vibration waveform and a knock waveform model by comparing the engine's vibration waveform with the knock waveform model st... | 07/31/2007 |
| 7243529 | Knock detecting apparatus for internal combustion engine A waveform knock signal detected by a knock sensor is filtered through a band-pass filter. The detected wave form signal is compared with an ideal reference knock waveform to determine an engine knock. The ideal reference knock waveform is derived on the basis of a ... | 07/17/2007 |
| 7219006 | Knock determining apparatus A knock determining apparatus includes a sensor which outputs a waveform signal corresponding to a knock state, and at least one of a first to a third knock determiner which determines a knock state based on a vibration intensity distribution of the waveform signal.... | 05/15/2007 |
| 7206691 | Internal combustion engine knock determination device An engine ECU executes a program including a step of calculating a knock intensity N as based on comparing a waveform detected as a waveform of a vibration attributed to knocking with a knock waveform model stored in a memory as a waveform of a vibration attributed ... | 04/17/2007 |
| 7201038 | Knock sensor and manufacturing method thereof A knock sensor is constructed by putting and fitting components including an annular piezoelectric element, terminal plate, insulating sheet and weight onto a base consisting of a flange portion and a tubular portion, forming a groove part on a tip outer circumferen... | 04/10/2007 |
| 7191658 | Pressure-detecting device and method of manufacturing the same One end of a rod-like pressure-conveying member is disposed in a sensing unit, and the other end extends into and through an insertion hole of an engine. A combustion pressure, to which the other end of the rod-like member is exposed, is conveyed to the sensing unit... | 03/20/2007 |
| 7178503 | System and method to pre-ignition in an internal combustion engine An engine system and method are disclosed for controlling pre-ignition of an alcohol fuel. In one embodiment, the fuel injection timing is adjusted to cause the fuel to avoid combustion chamber surfaces. In another embodiment, the fuel injection timing is adjusted t... | 02/20/2007 |
| 7146847 | Knock sensor for an internal combustion engine A knock sensor for an internal combustion engine with an electronically evaluated vibration sensor should have a simple design and allow a rational installation. To this end, the vibration sensor is characterized in that the... | 12/12/2006 |
| 7051575 | Control device for internal combustion engine A control device for an internal combustion engine comprising: a knocking sensor for detecting a knocking signal of the internal combustion engine; a band pass filter for extracting a knocking signal of a predetermined frequency band from the output signal of the kn... | 05/30/2006 |
| 7035718 | Method and System for detecting and reducing draft tube pressure fluctuations A method and system to reduce vibration in a turbine-generator including measuring a magnitude of radial vibration of a turbine shaft with at least one vibration sensor configured to generate a vibration signal indicative of vibration frequency; measuring a generato... | 04/25/2006 |
| 7004009 | Knocking sensor for internal combustion engine and manufacturing method of the same There is provided a knocking sensor for an internal combustion engine improved so that electrical damage of a terminal plate in an annular combination member is more certainly prevented. Only two communicating passages separate from each other by substantially 180 d... | 02/28/2006 |
| 6997034 | Method and apparatus for inspecting knocking detector When a knocking detector mounted on a cylinder block of an engine is inspected, the cylinder block is vibrated by a vibrating unit via a housing connected to the cylinder block, and the performance of the knocking detector is judged based on whether or not a peak va... | 02/14/2006 |
| 6923046 | Arrangement and method to measure cylinder pressure in a combustion engine The pressure in a cylinder of a combustion engine is determined on the basis of vibrations in the engine which are generated during movement of the piston. A vibration signal (S) from a vibration sensor situated on a cylinder is filtered in the region about the pist... | 08/02/2005 |
| 6922628 | IC engine diagnostic system using the peak and integration ionization current signals The present invention includes an engine diagnostic method and routine, wherein a method of using an ionization signal to perform an engine diagnostic routine includes the steps of detecting the ionization signal; integrating the ionization signal over a first sampl... | 07/26/2005 |
| 6868330 | Method of setting the knock detection sensor of a piston engine A method of operating a knock detection system of a multi-cylinder piston engine in which the knock detection system comprises a sensor arranged in connection with each cylinder and a measurement circuit connected to the sensor includes running the engine at a load ... | 03/15/2005 |
| 6789518 | Method and system for identifying valve clearances and position of valve opening cams In a method and system, the condition of a valve drive, particularly of valve clearance, and the position of at least one valve opening cam of a cam shaft of an internal combustion engine are recorded from processing signals which are generated by at least one impac... | 09/14/2004 |
| 6779381 | Threadless knock sensor A threadless knock sensor (10, 50) includes a sleeve (12, 52) around which a transducer (24, 64) and a load washer (30, 70) are disposed. A frusto-conical disk spring (34, 78) is installed in compression around the sleeve (12, 5... | 08/24/2004 |
| 6736109 | Knock control system A knock control system is configured to precisely determine situations in which the knock signal cannot be detected and to suppress the occurrence of reductions in fuel efficiency, exhaust performance, and output performance. The knock control system has a knock sen... | 05/18/2004 |
| 6546328 | Knock and misfire detection system The invention relates to a system for detection of combustion anomalies in an internal combustion engine, and includes a crank angle indicator, a vibration sensor, and a signal processor, wherein the signal processor receives signals from the indicator an... | 04/08/2003 |
